so is 500 gh/s any good looking to invest into something that does them speeds?
500 GH/s currently gives you 0.07367716 BTC per month, which is currently worth $33.08. This changes when the difficulty and bitcoin price changes.
To be profitable you need to buy the machine(s) at a good price per GH/s and you need electricity at a good price.
Many beginners think you earn a lot of money if you have a lot of hashpower and you lose money with a small amount of hashpower. That's not how it works. More hashpower will speed things up. Sure if you are profitable you earn money faster. But if you pay too much for electricity or per GH/s then getting more hashpower just means that you lose money faster.